java获取一年的周数、单周开始时间与结束时间、一年所有周开始时间与结束时间、月开始时间与结束时间
package com.frgk.produce.util;
import org.springframework.util.CollectionUtils;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
public class YearWeeksUtil {
public static void main(String[] args) {
String endtime = getYearEnd();
System.out.println(endtime);
//String currentYear = getCurrentYear();
//getWeekRangeMap(2021,53);
//getYearWeekMap(2021);
String retval = getMonthStart(2021,2);
System.out.println(retval);
retval = getMonthEnd(2021,2);
System.out.println(retval);
}
/**
* 获取当前年
* @return
*/
private static String getCurrentYear() {
Calendar calendar = Calendar.getInstance();
int weekYear = calendar.get(Calendar.YEAR);//获得当前的年
return weekYear+"";
}
/**
* 获取今天
* @return String
* */
public static String getToday(){
return new SimpleDateFormat("yyyy-MM-dd").format(new Date());
}
/**
* 获取昨天
* @return String
* */
public static String getYestoday(){
Calendar cal=Calendar.getInstance();
cal.add(Calendar.DATE,-1);
Date time=cal.getTime();
return new SimpleDateFormat("yyyy-MM-dd").format(time);
}
/**
* 获取本月开始日期
* @return String
* **/
public static String getMonthStart(){
Calendar cal=Calendar.getInstance();
cal.add(Calendar.MONTH, 0);
cal.set(Calendar.DAY_OF_MONTH, 1);
Date time=cal.getTime();
return new SimpleDateFormat("yyyy-MM-dd").format(time)+" 00:00:00";
}
/**
* 获取某年某月开始日期
* @return String
* **/
public static String getMonthStart(int year,int month){
Calendar cal=Calendar.getInstance();
cal.set(Calendar.YEAR, year);
cal.set(Calendar.MONTH, month-1);
cal.set(Calendar.DAY_OF_MONTH, 1);
Date time=cal.getTime();
return new SimpleDateFormat("yyyy-MM-dd").format(time)+" 00:00:00";
}
/**
* 获取本月最后一天
* @return String
* **/
public static String getMonthEnd(){
Calendar cal=Calendar.getInstance();
cal.set(Calendar.DAY_OF_MONTH, cal.getActualMaximum(Calendar.DAY_OF_MONTH));
Date time=cal.getTime();
return new SimpleDateFormat("yyyy-MM-dd").format(time)+" 23:59:59";
}
/**
* 获取某年某月最后一天
* @return String
* **/
public static String getMonthEnd(int year,int month){
Calendar cal=Calendar.getInstance();
cal.set(Calendar.YEAR, year);
cal.set(Calendar.MONTH, month-1);
cal.set(Calendar.DAY_OF_MONTH, cal.getActualMaximum(Calendar.DAY_OF_MONTH));
Date time=cal.getTime();
return new SimpleDateFormat("yyyy-MM-dd").format(time)+" 23:59:59";
}
/**
* 获取本周的第一天
* @return String
* **/
public static String getWeekStart(){
Calendar cal=Calendar.getInstance();
cal.add(Calendar.WEEK_OF_MONTH, 0);
cal.set(Calendar.DAY_OF_WEEK, 2);
Date time=cal.getTime();
return new SimpleDateFormat("yyyy-MM-dd").format(time)+" 00:00:00";
}
/**
* 获取本周的最后一天
* @return String
* **/
public static String getWeekEnd(){
Calendar cal=Calendar.getInstance();
cal.set(Calendar.DAY_OF_WEEK, cal.getActualMaximum(Calendar.DAY_OF_WEEK));
cal.add(Calendar.DAY_OF_WEEK, 1);
Date time=cal.getTime();
return new SimpleDateFormat("yyyy-MM-dd").format(time)+" 23:59:59";
}
/**
* 获取本年的第一天
* @return String
* **/
public static String getYearStart(){
return new SimpleDateFormat("yyyy").format(new Date())+"-01-01 00:00:00";
}
/**
* 获取某年的第一天
* @return String
* **/
public static String getYearStart(int year){
return year+"-01-01 00:00:00";
}
/**
* 获取本年的最后一天
* @return String
* **/
public static String getYearEnd(){
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.MONTH,calendar.getActualMaximum(Calendar.MONTH));
calendar.set(Calendar.DAY_OF_MONTH,calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
Date currYearLast = calendar.getTime();
return new SimpleDateFormat("yyyy-MM-dd").format(currYearLast)+" 23:59:59";
}
/**
* 获取某年的最后一天
* @return String
* **/
public static String getYearEnd(int year){
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.YEAR,year);
calendar.set(Calendar.MONTH,calendar.getActualMaximum(Calendar.MONTH));
calendar.set(Calendar.DAY_OF_MONTH,calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
Date currYearLast = calendar.getTime();
return new SimpleDateFormat("yyyy-MM-dd").format(currYearLast)+" 23:59:59";
}
/**
* 获取某年某周的时间跨度
* @param year
* @param week
* @return
*/
public static Map
Map
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.YEAR,year);
calendar.setFirstDayOfWeek(Calendar.MONDAY);//设置星期一为一周开始的第一天
calendar.setMinimalDaysInFirstWeek(4);//可以不用设置
int weekYear = calendar.get(Calendar.YEAR);//获得当前的年
calendar.setWeekDate(weekYear, week, 2);//获得指定年的第几周的开始日期
Date time=calendar.getTime();
String startTime = new SimpleDateFormat("yyyy-MM-dd").format(time)+" 00:00:00";
timeMap.put("startTime",startTime);
calendar.setWeekDate(weekYear, week, 1);//获得指定年的第几周的结束日期
time=calendar.getTime();
String endTime = new SimpleDateFormat("yyyy-MM-dd").format(time)+" 23:59:59";
timeMap.put("endTime",endTime);
return timeMap;
}
/**
* 获取某年有多少周
* @param year
* @return
* @throws ParseException
*/
public static int getYearWeekConut(int year){
int week = 52;
try {
/*Calendar calendar = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
calendar.setFirstDayOfWeek(Calendar.MONDAY);//设置星期一为一周开始的第一天
calendar.set(year, Calendar.DECEMBER, 31, 23, 59, 59);
week = calendar.get(Calendar.WEEK_OF_YEAR);*/
Map
if(!CollectionUtils.isEmpty(timeMap)){
String startTime = timeMap.get("startTime");
if(startTime.substring(0, 4).equals(year+"")){ //判断年度是否相符，如果相符说明有53个周。
week = 53;
}
}
} catch (Exception e) {
e.printStackTrace();
}
return week;
}
/**
* 获取某年所有周的时间跨度
* @param year
* @return
*/
public static Map
int weeks = getYearWeekConut(year);
Map
for (int i =1;i<=weeks;i++){
Map
yearWeekMap.put(i+"",timeMap);
}
return yearWeekMap;
}
}